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Wednesday, April 26, 2017

Astronomers have seen the “impossible” star cluster with hundreds of black holes


Globular cluster NGC 6101, located in the constellation of the Bird of Paradise, contains hundreds of black holes, said the group of scientists under the leadership of Miklos Payten from the University of Surrey. More recently, the existence of such clusters in our Universe was considered to be impossible, the authors of the opening.


photo: pixabay.com

Object NGC 6101, also known as Dun 68, GCL 40 or ESO 69-SC4, is located at a distance of about 47 600 kilometers of Land and 36 500 kilometres from the centre of the galaxy. It was opened nearly two centuries ago, in 1826, however, until very recently, astronomers had no idea about what is this unusual star cluster.

The main difficulty in the search for black holes is that to observe them with ordinary telescopes it is impossible — they are tightened to, including, and light. However, with the development of astronomy, professionals are inventing new methods to “hunt down” a black hole indirectly.

Watching the “behavior” of the visible matter in the cluster NGC 6101 and using this information to improve computer models. The results showed that the object contains hundreds, if not thousands, of small black holes the size they are only several times greater than the Sun. This discovery was a surprise to scientists — until now it was assumed that even if a much smaller “over-population” of the black holes was thrown outside of the clusters in supernova explosions.

The opening may, in particular, to indicate that clusters like NGC 6101 can be one of the main sources of gravitational waves, these fluctuations of space-time “catch” which the scientists were able only recently, often formed as a result of collision of black holes.

We will remind, recently, another group of experts was able to learn interesting details about one very unusual object called Terzan 5. It has also long been classified as a globular cluster, however, as it turned out, other objects of this type he did not like. Most scientists were surprised that this object, according to the latest data, in terms of age was comparable to our galaxy.

source

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